The Second Council of Constantinople is the fifth of the first seven ecumenical councils recognized by both the Eastern Orthodox Church and the Roman Catholic Church. It is also recognized by the Old Catholics and others. Protestant opinions and recognition of it are varied. Some Protestants, such as Calvinists and Lutherans, recognise the first four councils,[2] whereas most High Church Anglicans accept all seven. Constantinople II was convoked by the Byzantine Emperor Justinian I under the presidency of Patriarch Eutychius of Constantinople. It was held from 5 May to 2 June 553. Participants were overwhelmingly Eastern bishops – only sixteen Western bishops were present, including nine from Illyricum and seven from Africa, but none from Italy – out of the 152 total.[1][3]
The main work of the council was to confirm the condemnation issued by edict in 551 by the Emperor Justinian against the Three Chapters. These were the Christological writings and ultimately the person of Theodore of Mopsuestia (d. 428), certain writings against Cyril of Alexandria's Twelve Anathemas accepted at the Council of Ephesus, written by Theodoret of Cyrrhus (d. c. 466), and a letter written against Cyrillianism and the Ephesian Council by Ibas of Edessa (d. 457).[4]
The purpose of the condemnation was to make plain that the Great Church, which followed a Chalcedonian creed, was firmly opposed to Nestorianism as supported by the Antiochene school which had either assisted Nestorius, the eponymous heresiarch, or had inspired the teaching for which he was anathematized and exiled. The council also condemned the teaching that the Virgin Mary could not be rightly called the Mother of God (Gk. Theotokos) but only the mother of the man (Gk. anthropotokos) or the mother of Christ (Gk. Christotokos).[4]
Justinian hoped that this would contribute to a reunion between the Chalcedonians and monophysites in the eastern provinces of the Empire. Various attempts at reconciliation between these parties within the Byzantine Empire were made by many emperors over the four centuries following the Council of Ephesus, none of them successful. Some attempts at reconciliation, such as this one, the condemnation of the Three Chapters and the unprecedented posthumous anathematization of Theodore – who had once been widely esteemed as a pillar of orthodoxy – causing further schisms and heresies to arise in the process, such as the aforementioned schism of the Three Chapters and the emergent semi-monophysite compromises of monoenergism and monotheletism. These propositions assert, respectively, that Christ possessed no human energy but only a divine function or principle of operation (purposefully formulated in an equivocal and vague manner, and promulgated between 610 and 622 by the Emperor Heraclius under the advice of Patriarch Sergius I of Constantinople) and that Christ possessed no human will but only a divine will, "will" being understood to mean the desires and appetites in accord with the nature (promulgated in 638 by the same and opposed most notably by Maximus the Confessor).[4]
https://en.wikipedia.org/wiki/Second_Council_of_Constantinople
----------------------------------------------------------------------------------------------------------
----------------------------------------------------------------------------------------------------------
In Christianity, Arianism is a Christological[1] concept which asserts the belief that Jesus Christ is the Son of God who was begotten by God the Father at a point in time, is distinct from the Father and is therefore subordinate to the Father.[2] Arian teachings were first attributed to Arius (c. AD 256–336), a Christian presbyter in Alexandria, Egypt. The teachings of Arius and his supporters were opposed to the theological views held by Homoousian Christians, regarding the nature of the Trinity and the nature of Christ. The Arian concept of Christ is based on the belief that the Son of God did not always exist but was begotten by God the Father.[2]
There was a dispute between two interpretations (Arianism and Homoousianism) based upon the theological orthodoxy of the time, both of them attempted to solve its theological dilemmas.[2] So there were, initially, two equally orthodox interpretations which initiated a conflict in order to attract adepts and define the new orthodoxy.[2] Homoousianism was formally affirmed by the first two Ecumenical Councils. The Ecumenical First Council of Nicaea of 325 deemed Arianism to be a heresy.[3] All mainstream branches of Christianity now consider Arianism to be heterodox and heretical.[4]
According to Everett Ferguson, "The great majority of Christians had no clear views about the nature of the Trinity and they did not understand what was at stake in the issues that surrounded it."[3] At the regional First Synod of Tyre in 335, Arius was exonerated.[5] Constantine the Great was baptized by the Arian bishop Eusebius of Nicomedia.[6][7] After the deaths of both Arius and Constantine, Arius was again anathemised and pronounced a heretic again at the Ecumenical First Council of Constantinople of 381.[8] The Roman Emperors Constantius II (337–361) and Valens (364–378) were Arians or Semi-Arians, as was the first King of Italy, Odoacer (433?–493), and the Lombards were also Arians or Semi-Arians until the 7th century.
Arianism is also used to refer to other nontrinitarian theological systems of the 4th century, which regarded Jesus Christ—the Son of God, the Logos—as either a begotten being (as in Arianism proper and Anomoeanism) or as neither uncreated nor created in the sense other beings are created (as in Semi-Arianism).